+

US5995679A - Process for coding image sequences in a transmitter unit - Google Patents

Process for coding image sequences in a transmitter unit Download PDF

Info

Publication number
US5995679A
US5995679A US08/952,797 US95279797A US5995679A US 5995679 A US5995679 A US 5995679A US 95279797 A US95279797 A US 95279797A US 5995679 A US5995679 A US 5995679A
Authority
US
United States
Prior art keywords
pixel
image
computer
image part
key signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/952,797
Inventor
Thomas Riegel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Assigned to SEIMENS AKIENGESELLSCAFT reassignment SEIMENS AKIENGESELLSCAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RIEGEL, THOMAS
Application granted granted Critical
Publication of US5995679A publication Critical patent/US5995679A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
    • H04N19/27—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding involving both synthetic and natural picture components, e.g. synthetic natural hybrid coding [SNHC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability

Definitions

  • a key signal that indicates the ratio in which a pixel of a computer image part is to be respectively mixed with the corresponding pixel of the pixel-based image part.
  • the key signal is acquired from the pixel-based image parts by a color segmenting.
  • the intensity of the blue coloration thereby indicates the later mixing ratio in which the pixel information of the pixel of the computer image part is mixed with the corresponding pixel information of the pixel-based image part in the receiver unit.
  • the mixing of the two pixel information in the receiver unit is not a binary mixing.
  • the mixing is not binary, much information for the respectively mixing ratio must be transmitted for every dot with the assistance of the key signal.
  • the key signal thus requires a considerable amount of transmission capacity.
  • the information of the key signal has no additional informational content for the image itself but merely the information about the ratio in which the images should be mixed together in the receiver unit.
  • the invention is based on the problem of already partially mixing image sequences composed of computer image parts and pixel-based image parts in a suitable way and encoding them and thereby eliminating the transmission of the key signal that is normally additionally required.
  • the present invention is a method for encoding and decoding image sequences using computer image parts and pixel-based image parts on the basis of a key signal.
  • a transmission unit pixel information of a pixel of the computer image part is mixed dependent on the key signal with pixel information of a corresponding pixel of the pixel-based image part to form a partially mixed image sequence.
  • the partially mixed image sequence and the computer image part are transmitted from the transmission unit to a receiver unit. Only completely covering regions of the computer image part are rendered in the receiver unit. The completely covering regions of the computer image part are inserted into predetermined regions of the partially mixed image sequence.
  • Regions of the partially mixed image sequence that are completely covered by pixels of the computer image parts are blanked out before the encoding.
  • Regions in the partially mixed image sequence having the block size of the encoder that are completely covered by the computer image parts have a constant luminance value assigned to them.
  • the inventive method discloses a possibility of modifying the pixel-based image parts of image sequences dependent on the key signal before the encoding in order to be subsequently able to efficiently compress them with block-based encoders (for example, MPEC1 or MPEC2, etc.) and in order to be able to simply mix them binarily in the receiver unit.
  • block-based encoders for example, MPEC1 or MPEC2, etc.
  • the inventive method particularly has the advantage that the key signal that requires considerable transmission capacity in known methods is reduced and, thus, the required transmission capacity is reduced.
  • a development of the method has the advantage that the image sequence can be efficiently encoded given employment of block-based encoders (for example, MPEG1, MPEG2, etc.).
  • block-based encoders for example, MPEG1, MPEG2, etc.
  • the receiver unit can be fashioned significantly simpler in that the two image parts can be binarily mixed in the receiver unit dependent on the key signal.
  • the single FIGURE shows a block circuit diagram that illustrates the inventive method.
  • a part of the color blue of a pixel defines how a pixel-based image part PB is to be mixed with a computer image part CB.
  • the computer image part CB is, for example, a computer graphic.
  • a decision as to whether and to what extent a corresponding pixel of the computer image part CB is to be inserted is made on the basis of the pure blue part of the respective pixel in the pixel-based image part PB.
  • the intensity of the blue coloration thereby indicates the later mixing ratio of the pixel information of the pixel of the pixel-based image part PB and of the corresponding pixel of the computer image part CB.
  • a key signal K In the calculation of a key signal K, all those areas that must be presented transparent, shadowed or lightened in the rendering of the computer models are also additionally written, first, into the key signal K in the form of pixel areas. The degree of the transparency as well as, potentially, illumination effects are co-indicated, these being encoded as gray scale values. Subsequently, those pixels that are colored blue in the pixel-based image part PB are suitably added to the key signal K according to their blue intensity.
  • the key signal K with whose assistance the transmission unit can easily decide whether a given pixel must be mixed or not, is obtained on the basis of the procedure described above.
  • the decision in the transmission unit can be made according to the following rules: when the corresponding pixel in the key signal K is white, then the corresponding pixel from the computer image part CB is inserted into a partially mixed image sequence TGB.
  • the partially mixed image sequence TGB refers to an image sequence with images whose pixel information was merged with the pixels from the computer image part CB and the corresponding pixels from the pixel-based image part PB.
  • the corresponding pixel in the key signal K is black, then the corresponding pixel from the pixel-based image part PB is inserted into the partially mixed image sequence TGB.
  • the mixing ratio is indicated in the key signal K and is calculated in the transmission unit in a way familiar to a person skilled in the art.
  • regions that are completely covered by regions of the computer image part CB are blanked out before the encoding of the partially mixed image sequence TGB.
  • the information as to whether a region of the computer image part CB completely covers a region of the partially mixed image sequence TGB is contained in an attribute of the 3D models of the computer image part CB.
  • the symbolic description of the computer image part CB i.e. a script file and associated data
  • the partially mixed image sequence TGB are encoded and transmitted to a receiver unit.
  • the receiver unit only the completely covering regions of the computer image part CB are rendered and inserted into the partially mixed image sequence TGB, as indicated in the attributes of the computer image part, for example the location of the introduced object of is the computer image part CB within the partially mixed image sequence TGB.
  • block-based encoders for example, MPEG1, MPEG2, etc.
  • the encoding given block-based encoders is thus considerably more efficiently configured.
  • a potentially provided post-processing of the image sequences for example an anti-aliasing for edge smoothing of the decoded, remaining computer image sequences CBR, is implemented at the receiver side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)
  • Processing Of Color Television Signals (AREA)
  • Image Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

The method achieves a reduction of the required transmission capacity. This occurs in that pixels of pixel-based image parts (PB) and corresponding pixels of computer image parts (CB) that overlap are already merged in the transmission unit according to the blue part of the pixel of the pixel-based image part (PB) and according to the computer model attributes, so that a key signal (K) is no longer transmitted. The key signal (K) usually indicates the ratio in which the pixel of the pixel-based image part (PB) should be merged with the pixel of the computer image part (CB). In known methods, this information is not binary. In the receiver unit, thus, the only thing decided is whether the pixel is taken from a partially mixed image sequence (TGB) or from the computer image parts (CB).

Description

BACKGROUND OF THE INVENTION
In the encoding of image sequences that represent a combination of computer image parts, for example image parts that are constructed from computer graphics, and pixel-based image parts, for example image parts that are registered by a camera, it is known to separately encode and transmit the input data of the computer graphics (script files with associated data) and the pixel-based image parts. It is only at the receiver that the graphics models are then rendered and mixed with the pixel-based image parts. Since the mixing is not a binary operation, the information about the ratio in which the mixing should be carried out must be additionally transmitted for each pixel. This information is stored in a key signal and is acquired by a color segmenting from the camera signal in traditional television (F. Fechter et al., "Signal processing for a digital HDTV chromakey mixer", Signal Processing: Image Communications 5, 1993, pp. 417-423 and T. Sprague, "Merging Digital Technology into an Analog World", SMPTE Journal, February 1994, Vol. 103, No. 2, 1994, pp. 100-104).
Methods are known for transmission that separately encode computer image parts and pixel-based image parts in a transmission unit, together with what is referred to as a key signal that indicates the ratio in which a pixel of a computer image part is to be respectively mixed with the corresponding pixel of the pixel-based image part. In blue box exposures, for example, the key signal is acquired from the pixel-based image parts by a color segmenting. The intensity of the blue coloration thereby indicates the later mixing ratio in which the pixel information of the pixel of the computer image part is mixed with the corresponding pixel information of the pixel-based image part in the receiver unit. The mixing of the two pixel information in the receiver unit is not a binary mixing.
Since the mixing is not binary, much information for the respectively mixing ratio must be transmitted for every dot with the assistance of the key signal. The key signal thus requires a considerable amount of transmission capacity. However, the information of the key signal has no additional informational content for the image itself but merely the information about the ratio in which the images should be mixed together in the receiver unit.
SUMMARY OF THE INVENTION
The invention is based on the problem of already partially mixing image sequences composed of computer image parts and pixel-based image parts in a suitable way and encoding them and thereby eliminating the transmission of the key signal that is normally additionally required.
In general terms the present invention is a method for encoding and decoding image sequences using computer image parts and pixel-based image parts on the basis of a key signal. In a transmission unit, pixel information of a pixel of the computer image part is mixed dependent on the key signal with pixel information of a corresponding pixel of the pixel-based image part to form a partially mixed image sequence. The partially mixed image sequence and the computer image part are transmitted from the transmission unit to a receiver unit. Only completely covering regions of the computer image part are rendered in the receiver unit. The completely covering regions of the computer image part are inserted into predetermined regions of the partially mixed image sequence.
Advantageous developments of the present invention are as follows.
Regions of the partially mixed image sequence that are completely covered by pixels of the computer image parts are blanked out before the encoding.
Regions in the partially mixed image sequence having the block size of the encoder that are completely covered by the computer image parts have a constant luminance value assigned to them.
The inventive method discloses a possibility of modifying the pixel-based image parts of image sequences dependent on the key signal before the encoding in order to be subsequently able to efficiently compress them with block-based encoders (for example, MPEC1 or MPEC2, etc.) and in order to be able to simply mix them binarily in the receiver unit. As a result thereof, the key signal, which contains the information of the mixing ratio of the computer image parts with the pixel-based image parts, can be substantially foregone.
Compared to known methods, the inventive method particularly has the advantage that the key signal that requires considerable transmission capacity in known methods is reduced and, thus, the required transmission capacity is reduced.
A development of the method has the advantage that the image sequence can be efficiently encoded given employment of block-based encoders (for example, MPEG1, MPEG2, etc.).
The receiver unit can be fashioned significantly simpler in that the two image parts can be binarily mixed in the receiver unit dependent on the key signal.
BRIEF DESCRIPTION OF THE DRAWING
The features of the present invention which are believed to be novel, are set forth with particularity in the appended claims. The invention, together with further objects and advantages, may best be understood by reference to the following description taken in conjunction with the accompanying drawing, in which:
The single FIGURE shows a block circuit diagram that illustrates the inventive method.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In what are referred to as blue box exposures, a part of the color blue of a pixel (blue part) defines how a pixel-based image part PB is to be mixed with a computer image part CB. What is to be understood in this context by the computer image part CB is, for example, a computer graphic. A decision as to whether and to what extent a corresponding pixel of the computer image part CB is to be inserted is made on the basis of the pure blue part of the respective pixel in the pixel-based image part PB. The intensity of the blue coloration thereby indicates the later mixing ratio of the pixel information of the pixel of the pixel-based image part PB and of the corresponding pixel of the computer image part CB. When a pixel of the pixel-based image part PB is not colored blue, then it remains unaffected, i.e. the pixel of the pixel-based image part PB is not merged with the corresponding pixel of the computer image part CB.
In computer models, whether areas of the computer model are transparent is additionally indicated for the computer image part CB by the material properties. The degree of transparency is likewise stored as computer model attribute. The coordinates in which the computer models are to be inserted into the pixel-based image part PB are also indicated. The calculation of illumination effects (shadow, mirroring, etc.) ensues separately. As a result thereof, a decision as to which pixels of the image are to be darkened or lightened can be made in what is referred to as the rendering. This information respectively enters into the respectively affected pixel, so that this information also enters in in the merging of the pixels of the pixel-based image part PB and the corresponding pixel of the computer image part CB.
In the calculation of a key signal K, all those areas that must be presented transparent, shadowed or lightened in the rendering of the computer models are also additionally written, first, into the key signal K in the form of pixel areas. The degree of the transparency as well as, potentially, illumination effects are co-indicated, these being encoded as gray scale values. Subsequently, those pixels that are colored blue in the pixel-based image part PB are suitably added to the key signal K according to their blue intensity.
The key signal K, with whose assistance the transmission unit can easily decide whether a given pixel must be mixed or not, is obtained on the basis of the procedure described above. For example, the decision in the transmission unit can be made according to the following rules: when the corresponding pixel in the key signal K is white, then the corresponding pixel from the computer image part CB is inserted into a partially mixed image sequence TGB.
In this context, the partially mixed image sequence TGB refers to an image sequence with images whose pixel information was merged with the pixels from the computer image part CB and the corresponding pixels from the pixel-based image part PB.
When the corresponding pixel in the key signal K is black, then the corresponding pixel from the pixel-based image part PB is inserted into the partially mixed image sequence TGB.
When the corresponding pixel in the key signal K exhibits a different brightness for the respective pixel, then the color information of the pixel from the information contained in the computer image part CB and the color information of the corresponding pixel from the pixel-based image part are mixed together. This situation arises, for example, given shadows of objects of the computer image part CB onto regions of the pixel-based image part, as a result whereof the color information of the pixels of the region onto which the shadow of the respective object "falls" is modified.
The mixing ratio is indicated in the key signal K and is calculated in the transmission unit in a way familiar to a person skilled in the art.
After the partially mixed image sequence TGB was formed in the above-described way, regions that are completely covered by regions of the computer image part CB are blanked out before the encoding of the partially mixed image sequence TGB. The information as to whether a region of the computer image part CB completely covers a region of the partially mixed image sequence TGB is contained in an attribute of the 3D models of the computer image part CB.
Subsequently, the symbolic description of the computer image part CB, i.e. a script file and associated data, and the partially mixed image sequence TGB are encoded and transmitted to a receiver unit.
In the receiver unit, only the completely covering regions of the computer image part CB are rendered and inserted into the partially mixed image sequence TGB, as indicated in the attributes of the computer image part, for example the location of the introduced object of is the computer image part CB within the partially mixed image sequence TGB.
A further calculation of, for example, shadows of the introduced objects is no longer necessary in the receiver unit since these were already implemented in the transmission unit. The only thing still remaining, thus, in the receiver unit is a purely binary mixing. The transmission of the key signal K is eliminated.
Given employment of block-based encoders (for example, MPEG1, MPEG2, etc.), it is advantageous to set regions in the partially mixed image sequence TGB having the block size of the encoder that are completely covered by the pixels of the computer image part CB to a constant value. The encoding given block-based encoders is thus considerably more efficiently configured.
A potentially provided post-processing of the image sequences, for example an anti-aliasing for edge smoothing of the decoded, remaining computer image sequences CBR, is implemented at the receiver side.
The invention is not limited to the particular details of the method depicted and other modifications and applications are contemplated. Certain other changes may be made in the above described method without departing from the true spirit and scope of the invention herein involved. It is intended, therefore, that the subject matter in the above depiction shall be interpreted as illustrative and not in a limiting sense.

Claims (3)

What is claimed is:
1. A method for encoding and decoding image sequences upon employment of computer image parts and pixel-based image parts based on a key signal, comprising the steps of:
mixing, in a transmission unit, pixel information of a pixel of a computer image part dependent on a key signal with pixel information of a corresponding pixel of a pixel-based image part to form a partially mixed image sequence;
transmitting the partially mixed image sequence and the computer image part are transmitted from the transmission unit to a receiver unit;
rendering only completely covering regions of the computer image part in the receiver unit; and
inserting the completely covering regions of the computer image part into predetermined regions of the partially mixed image sequence.
2. The method according to claim 1, wherein regions of the partially mixed image sequence that are completely covered by pixels of the computer image parts are blanked out before encoding the image sequences.
3. The method according to claim 1, wherein regions in the partially mixed image sequence having a block size of an encoder that are completely covered by the computer image parts have a constant luminance value assigned thereto.
US08/952,797 1995-05-22 1996-05-03 Process for coding image sequences in a transmitter unit Expired - Lifetime US5995679A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19518705 1995-05-22
DE19518705A DE19518705C1 (en) 1995-05-22 1995-05-22 Method for coding image sequences in a transmission unit
PCT/DE1996/000782 WO1996038005A1 (en) 1995-05-22 1996-05-03 Process for coding image sequences in a transmitter unit

Publications (1)

Publication Number Publication Date
US5995679A true US5995679A (en) 1999-11-30

Family

ID=7762540

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/952,797 Expired - Lifetime US5995679A (en) 1995-05-22 1996-05-03 Process for coding image sequences in a transmitter unit

Country Status (6)

Country Link
US (1) US5995679A (en)
EP (1) EP0827671B1 (en)
JP (1) JP3839054B2 (en)
KR (1) KR100409111B1 (en)
DE (2) DE19518705C1 (en)
WO (1) WO1996038005A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304277B1 (en) * 1999-01-15 2001-10-16 Colorcentric.Com, Inc. Remote modification of digital images using scripts
US20150172559A1 (en) * 2012-07-07 2015-06-18 Scalable Video Systems Gmbh System and Method for Processing Video and or Audio Signals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6084982A (en) * 1997-12-17 2000-07-04 Philips Electronics North America Corp. Method of chroma-keying for a digital video compression system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113251A (en) * 1989-02-23 1992-05-12 Fuji Xerox Co. Editing control system and area editing system for image processing equipment
EP0568356A2 (en) * 1992-04-29 1993-11-03 Canon Kabushiki Kaisha Video processor system
US5539866A (en) * 1994-05-11 1996-07-23 Xerox Corporation Method and apparatus for accurately rendering half-bitted image pixels
US5805228A (en) * 1996-08-09 1998-09-08 U.S. Robotics Access Corp. Video encoder/decoder system
US5892847A (en) * 1994-07-14 1999-04-06 Johnson-Grace Method and apparatus for compressing images

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113251A (en) * 1989-02-23 1992-05-12 Fuji Xerox Co. Editing control system and area editing system for image processing equipment
EP0568356A2 (en) * 1992-04-29 1993-11-03 Canon Kabushiki Kaisha Video processor system
US5539866A (en) * 1994-05-11 1996-07-23 Xerox Corporation Method and apparatus for accurately rendering half-bitted image pixels
US5892847A (en) * 1994-07-14 1999-04-06 Johnson-Grace Method and apparatus for compressing images
US5805228A (en) * 1996-08-09 1998-09-08 U.S. Robotics Access Corp. Video encoder/decoder system

Non-Patent Citations (10)

* Cited by examiner, † Cited by third party
Title
"Coding of Combined Natural & Computer Rendered Image Sequences", Thomas Riegel, SPIE vol. 2451/207-211, pp. 207-211, Munich, Germany, 1995, 0-8194-1802-1/95/.
Coding of Combined Natural & Computer Rendered Image Sequences , Thomas Riegel, SPIE vol. 2451/207 211, pp. 207 211, Munich, Germany, 1995, 0 8194 1802 1/95/. *
Fernseh und Kino Technik vol. 47, No. 1, S. Hartwig et al, (1993), (Tutorial) Digitale Bildcodierung, pp. 33 42. *
Fernseh-und Kino-Technik vol. 47, No. 1, S. Hartwig et al, (1993), (Tutorial) Digitale Bildcodierung, pp. 33-42.
Plenary, Special Audio. Underwater Acoustics, VLSI, Neural Networks, (1993) IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 99 102. (No Author). *
Plenary, Special Audio. Underwater Acoustics, VLSI, Neural Networks, (1993) IEEE International Conference on Acoustics, Speech, and Signal Processing, pp. 99-102. (No Author).
Signal Processing: Image Communications, vol. 5, (1993), Frank Fechter et al, Signal Processing for a Digital HDTV Chromakey Mixer, pp. 417 423. *
Signal Processing: Image Communications, vol. 5, (1993), Frank Fechter et al, Signal Processing for a Digital HDTV Chromakey Mixer, pp. 417-423.
SMPTE Journal, vol. 103, No. 2, Feb. 1994, T. Sprague, Merging Digital Technology into an Analog World, pp. 100 104. *
SMPTE Journal, vol. 103, No. 2, Feb. 1994, T. Sprague, Merging Digital Technology into an Analog World, pp. 100-104.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304277B1 (en) * 1999-01-15 2001-10-16 Colorcentric.Com, Inc. Remote modification of digital images using scripts
US20150172559A1 (en) * 2012-07-07 2015-06-18 Scalable Video Systems Gmbh System and Method for Processing Video and or Audio Signals
US9462195B2 (en) * 2012-07-07 2016-10-04 Scalable Video Systems Gmbh System and method for distributed video and or audio production

Also Published As

Publication number Publication date
JPH11505396A (en) 1999-05-18
EP0827671B1 (en) 1998-11-18
DE19518705C1 (en) 1996-11-21
DE59600841D1 (en) 1998-12-24
KR100409111B1 (en) 2004-01-24
WO1996038005A1 (en) 1996-11-28
KR19990021843A (en) 1999-03-25
JP3839054B2 (en) 2006-11-01
EP0827671A1 (en) 1998-03-11

Similar Documents

Publication Publication Date Title
US6181822B1 (en) Data compression apparatus and method
JP3210862B2 (en) Image encoding device and image decoding device
JPH07236062A (en) Picture processor and method therefor
KR19990071820A (en) Video graphics downloading of accelerated text characters and line technologies
EP0969656A1 (en) Compression for image boundaries
IL272813B (en) "A method for encoding and a method for decoding a search panel and compatible devices"
US8630500B2 (en) Method for the encoding by segmentation of a picture
US5995679A (en) Process for coding image sequences in a transmitter unit
JP3462867B2 (en) Image compression method and apparatus, image compression program, and image processing apparatus
US11582464B2 (en) Using morphological operations to process frame masks in video content
CN1183766C (en) Simplified logo insertion in encoded signal
EP0960525B1 (en) Method of chroma-keying for a digital video compression system
JPH07320067A (en) Device and method for segmented image coding accompanied by no information loss
CN1232100C (en) Image coding equipment and decoding equipment
KR20050012809A (en) Video encoding method and corresponding encoding and decoding devices
US20050100189A1 (en) Image processing apparatus
GB2163026A (en) Still picture transmission
GB2512657A (en) Transmitting and receiving a composite image
JP2832073B2 (en) Image coding device
US11601665B2 (en) Embedding frame masks in a video stream
JP2005341098A (en) Image processing unit, program, and recording medium
JPH03231565A (en) Picture coding device
WO2002039752A2 (en) High quality color key extraction apparatus
JP2005341490A (en) Document data structure, method and device for document conversion, method and device for document restoration, document conversion program, document restoration program, and recording medium
Nikitenko The Analysis of Methods of Coding MPEG-4 Video for the Search of Possibilities of Embedding Watermarking. Part I

Legal Events

Date Code Title Description
AS Assignment

Owner name: SEIMENS AKIENGESELLSCAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RIEGEL, THOMAS;REEL/FRAME:009071/0940

Effective date: 19960320

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载